Loom shuttle



J. C. BROOKS Aug. 7, 1928.

LOO! SHUTTLE Fi'led June 29, 1925 lnven'ror. John C. Brooks b mwkfijmm ATTys.

Patented Aug. 7, 1928.

LJ'NITEID STATES PATENT OFFICE.

JOHN C. BROOKS, OF PATERSON, NEW JERSEY, ASSIG'NOR TO CROMPTON & KNOWLES LOOM WORKS, F WORCESTER, MASSACHUSETTS,'A CORPORATION OF MASSACHU- SETTS.

LOOM SHUTTLE.

Application filed June 29, 1925. Serial No. 40,362.

This invention relates particularly to 100m shuttles that are designed for use in a loom in which the shuttles are thrown through the shed by the action of compressed air delivered from a jet pipe and acting directly on the shuttle, and the object of the invention is to provide an improved shuttle'ot this type which will have increased ell'ectiveness.

This object is attained by forming in the ends of the shuttle axially thereof a chamber open at the end of the shuttle which is so arranged that when the shuttle is boxed the end of the jet pipe is in line with the re: cess and partially enters the same.

this arrangement the blast of air which is deliver-ed from the jet pipe for throwing the shuttle across the shed will be prevented from lateral expansion due to the fact that the end of the jet pipe enters the chamber and, therefore, the full force of the air will be utilized in propelling the shuttle forwardly. Moreover, the deliveryot' the air blast will form an increased pressure in the chamher and as soon as the shuttle starts on its 1 flight the compressed air in the chamber will tend to expand and as the only direction in which it can expand is in the open end of the chamber such expansion will add a propelling force to the shuttle.

In order to give an understanding of the invention I have illustrated in thedrawings aselected embodiment thereof which will now be described after which the novel features will be pointed out in the appended claims.

Fig. 1 is a top plan view of a shuttle body having my improvements applied thereto;

Fig. 2 is a top plan view of the shuttle tip detached from the shuttle;

Fig. 3 is a side view of the shuttle tip also detached from the shuttle;

Fig. .4 is a longitudinal section on the line H, Fig. 3;

Fig. 5 is a longitudinal section on the line 5-5, Fig.2. I

In the drawings 10 indicates a shuttle body having the usual opening 11 in which the bobbin is received. The shuttle is provided at each end with a tip 12 of special With construction. Each tip has the taperedbody portion 1 and the shank portion 4, the shank portion being set into a recess formed in the end of the shuttle body 1. v The tapered portion of each tip-is provided. with a slot 2 and the shank is provided with a central chamber 3 which is open only at the end of the shank, said chamber 3 opening into the slot 2. A shuttle thus made presents a slot- 2 at each end and a chamber 3 extending inwardly from the slot, both the slot and chamber being axially arranged.

As stated above my improved shuttle is particularly designed for use in a loom in which the shuttle is thrown through the shed by the force of an air blast delivered from an airjet pipe. A loom. of this type is shown in my co-pending Patent No. 1,667,- 306 issued April 24, 1928. This loom is so arranged that when the shuttle is boxed the end of the jet pipe will be in line with and perhaps partially enter the chamber 3 of the shuttle. Since the present invention relates to the shuttle only I have not deemed it necessary to illustrate the loom but have shown in dotted lines in Fig. 1 the end of a jet pipe which delivers the blast of air for driving the shuttle through the shed. Such jetpipe is indicated at 13 and it is so arranged that when the shuttle is boxed the end of the jet pipe will come flush with or perhaps partially enter the chamber 3.

When the blast of air is delivered from the jet pipe the air will be prevented fromlateral expansion because of the fact that the end of the jet pipe comes flush with or partially enters the chamber 3 and consequently the full force of the air blast will be utilized in propelling the shuttle forwardly. The delivery ot' the blast of air will, of course, cause an increase of pressure in the chamber 3 and as soon as the shuttle begins to start on its flight the compressed air in the chamber 3 willinstantly expand and as the only direction in which it can expand is toward the open end of the chamber such expansion will produce an added impulse or propelling force which will augment the propelling force of the air blast.

I claim:

1. A shuttle comprising a body, a shuttle tip at each. end, each tip having a stem extending axially into the body and provided with an axial chamber which is open at the end, the end of the tip being tapered and provided with a transverse slot which communicates with the axial chamber.

2. A shuttle having at each end a central recess of fixed dimension which is open at the end, each tip end of the shuttle being fixed with relation to the body of the shuttle and being provided with a transverse slot which communicates with the recess.

In testimony whereof I set my signature.

JOHN G. BROOKS. 

